Bitcoin stocks surge on crypto tear after Tesla buys in

Crypto-linked stocks soar in premarket trading, following the Tesla-fueled jump in Bitcoin (BTC-USD), which now passes $43K, its highest point ever.Marathon Patent Group (MARA) surges 21%, Grayscale Bitcoin Trust (GBTC) climbs 17%, Riot Blockchain (RIOT) +18%, MicroStrategy (MSTR) +14%.Other cryptos also gain: Ethereum (ETH-USD) +5.0% to $1,699.47; Doge (DOGE-USD), also touted by Tesla's Musk, +28% to $0.0783, XRP (XRP-USD) +5.4% to $0.4599.MSTR, RIOT, and MARA outpace Bitcoin's performance in the past six months, while GBTC lags (see chart below).Late last month, Ray Dalio took less skeptical tune regarding Bitcoin.